Use lwIP 1.4.1 as the default TCP/IP protocol stack

components/net/SConscript

@@ -6,9 +6,9 @@ from building import *
 objs = []
 list = os.listdir(os.path.join(RTT_ROOT, 'components', 'net'))
 
-# the default version of LWIP is 1.4.0
-if not GetDepend('RT_USING_LWIP132') and not GetDepend('RT_USING_LWIP141'):
-    AddDepend('RT_USING_LWIP140')
+# the default version of LWIP is 1.4.1
+if not GetDepend('RT_USING_LWIP132') and not GetDepend('RT_USING_LWIP140'):
+    AddDepend('RT_USING_LWIP141')
 
 for d in list:
     path = os.path.join(RTT_ROOT, 'components', 'net', d)